Global Patent Index - EP 4047044 A4

EP 4047044 A4 20221214 - SPACER, MANUFACTURING METHOD THEREFOR, AND COMPOSITE

Title (en)

SPACER, MANUFACTURING METHOD THEREFOR, AND COMPOSITE

Title (de)

ABSTANDSHALTER, HERSTELLUNGSVERFAHREN DAFÜR UND VERBUNDSTOFF

Title (fr)

ENTRETOISE, SON PROCÉDÉ DE FABRICATION ET COMPOSITE

Publication

EP 4047044 A4 20221214 (EN)

Application

EP 20877930 A 20201012

Priority

  • JP 2019189740 A 20191016
  • JP 2020038536 W 20201012

Abstract (en)

[origin: EP4047044A1] A spacer used in an electrical device that sends and receives radio waves comprises a foam that contains a resin composition containing a thermoplastic resin or a thermosetting resin as a base resin. In a case in which the foam is not a foam formed of foam particles, a ratio (B/A) of an average value B of diameters of cells included in a range of 20% to 80% in a thickness direction from a surface of the foam relative to an average value A of diameters of cells in contact with the surface of the foam is not less than 0.3 and less than 3.0. In a case in which the foam is a foam formed of foam particles, for foam particles that are included in a range of 10% to 90% in a thickness direction from a surface of the foam, a ratio (B'/A') of an average value B' of diameters of cells included in a range of 20% to 80% in a radial direction from surfaces of the foam particles relative to an average value A' of diameters of cells in contact with the surfaces of the foam particles is not less than 0.3 and less than 3.0. Water absorption of the resin composition in a high-temperature and high-humidity environment is 2.2 mass% or less, and, when the relative permittivity of the foam at 28 GHz is taken to be εr and the dielectric dissipation factor of the foam at 28 GHz is taken to be tan δ, (εr)<sup>1/2</sup> × tan δ is 0.0120 or less.

IPC 8 full level

C08J 9/12 (2006.01); C08J 9/00 (2006.01); C08J 9/14 (2006.01); C08J 9/18 (2006.01); C08J 9/232 (2006.01); H01Q 1/42 (2006.01)

CPC (source: CN EP KR US)

C08J 9/12 (2013.01 - CN); C08J 9/122 (2013.01 - EP); C08J 9/141 (2013.01 - EP KR US); C08J 9/18 (2013.01 - EP); C08J 9/228 (2013.01 - CN KR US); C08J 9/232 (2013.01 - EP); H01Q 1/40 (2013.01 - US); C08J 9/0061 (2013.01 - EP); C08J 2201/03 (2013.01 - EP); C08J 2201/034 (2013.01 - EP); C08J 2203/06 (2013.01 - EP); C08J 2203/14 (2013.01 - EP US); C08J 2323/06 (2013.01 - EP); C08J 2325/06 (2013.01 - EP); C08J 2371/12 (2013.01 - EP); C08J 2425/06 (2013.01 - EP); C08J 2471/12 (2013.01 - EP); H01Q 1/424 (2013.01 - EP)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4047044 A1 20220824; EP 4047044 A4 20221214; CN 114514271 A 20220517; CN 114514271 B 20230321; JP 7158600 B2 20221021; JP WO2021075409 A1 20210422; KR 20220024769 A 20220303; TW 202126738 A 20210716; TW I774086 B 20220811; US 2023151175 A1 20230518; WO 2021075409 A1 20210422

DOCDB simple family (application)

EP 20877930 A 20201012; CN 202080068869 A 20201012; JP 2020038536 W 20201012; JP 2021552381 A 20201012; KR 20227001981 A 20201012; TW 109135827 A 20201016; US 202017754814 A 20201012